# How do you solve #5x + y = 8# and #–4x – 4y = – 16# using substitution?

##### 1 Answer

Apr 18, 2018

#### Explanation:

So always when you try to solve systems, if you find either a single y or x then use the substitution, just something I always do. Anyway so here we have

And in the first one we have a single y ( shown below)

Now we re-write it to get:

Put this equation :

into the other to get:

Simplify:

Simplify more:

Divide 16 on both sides to get:

Now put that into any equation to get:

Simplify to get

y=3

Now check you work by putting in the numbers into the other equation to get:

So it's right with

Hope this helps!